20606216655705 has 16 divisors (see below), whose sum is σ = 32982207757440. Its totient is φ = 10985895180288.

The previous prime is 20606216655683. The next prime is 20606216655757. The reversal of 20606216655705 is 50755661260602.

It is not a de Polignac number, because 20606216655705 - 2¹⁷ = 20606216524633 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255398077 + ... + 255478746.

It is an arithmetic number, because the mean of its divisors is an integer number (2061387984840).

Almost surely, 2^{20606216655705} is an apocalyptic number.

It is an amenable number.

20606216655705 is a deficient number, since it is larger than the sum of its proper divisors (12375991101735).

20606216655705 is a wasteful number, since it uses less digits than its factorization.

20606216655705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510879520.

The product of its (nonzero) digits is 4536000, while the sum is 51.

The spelling of 20606216655705 in words is "twenty trillion, six hundred six billion, two hundred sixteen million, six hundred fifty-five thousand, seven hundred five".